首页> 外文会议>2009 IEEE International Symposium on IT in Medicine Education( IEEE 教育与医药信息化国际会议)论文集 >Impacts of Land Use and Land Cover Changes upon Oxygen Regulation Values for the Karst Ecosystem: a Case Study of Northwest Guangxi, China
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Impacts of Land Use and Land Cover Changes upon Oxygen Regulation Values for the Karst Ecosystem: a Case Study of Northwest Guangxi, China

机译:土地利用和土地覆盖变化对喀斯特生态系统氧气调节值的影响:以桂西北地区为例

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The poverty and environmental degradation are very serious in karst regions of southwest China. In this paper, the spatial distributions and variations of oxygen regulation values (ORVs) were evaluated for the typical karst areas in Northwest Guangxi, China from 1985 to 2005, based on remote sensing and geographic information system techniques. The results showed that ORVs decreased firstly and then increased. ORVs were 9170 million Yuan in 1985, 5831 million Yuan in 1990, 7802 million Yuan in 2000 and 8793 million Yuan in 2005, respectively. Woodland and shrub were the two largest contributors to total ORVs (70.51% in 1985, 69.13% in 1990, 73.35% in 2000 and 66.23% in 2005). ORVs declined from west to east, and increased from 4338 million Yuan in 1985 to 4780 million Yuan in 2005 in the typical karst areas. This indicates that ecosystem conditions are improving because of the application of rocky desertification control policies.
机译:中国西南喀斯特地区的贫困和环境恶化十分严重。本文利用遥感和地理信息系统技术,对1985-2005年广西西北部典型喀斯特地区的氧气调节值(ORVs)进行了空间分布和变化评估。结果表明,ORV先下降后上升。 1985年ORV分别为91.7亿元,1990年的58.31亿元,2000年的78.02亿元和2005年的89.93亿元。林地和灌木是总ORV的两个最大贡献者(1985年为70.51%,1990年为69.13%,2000年为73.35%,2005年为66.23%)。在典型的喀斯特地区,ORV从西向东下降,从1985年的43.38亿元增加到2005年的47.8亿元。这表明由于实施了石漠化控制政策,生态系统状况正在改善。

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